Arduino Data Logger Shield for Boards Compatible

Arduino Data Logger Shield for Boards Compatible

Overview

The Arduino Data Logger Shield is a versatile expansion board designed to work with various Arduino boards, enabling users to log data from sensors, analog inputs, and digital inputs to a microSD card. This shield is ideal for applications requiring data logging, such as environmental monitoring, industrial automation, and IoT projects.

Features

Compatible with various Arduino boards, including Uno, Mega, and Due
 MicroSD card slot for data storage
 3x Analog input channels (0-5V)
 4x Digital input channels
 Real-time clock (RTC) with battery backup
 Supports FAT16 and FAT32 file systems

Hardware Connections

To use the Data Logger Shield, connect it to an Arduino board as follows:

Stack the shield on top of the Arduino board, ensuring the pins align correctly.
 Insert a microSD card into the shield's microSD card slot.

Software Examples

### Example 1: Logging Sensor Data

In this example, we'll log temperature and humidity data from a DHT11 sensor to a microSD card.

```c++
#include <DHT.h>
#include <SD.h>

// Define DHT11 sensor pin connections
#define DHT11_PIN 2

// Create a DHT object
DHT dht(DHT11_PIN, DHT11);

void setup() {
  // Initialize the SD card
  SD.begin();

// Create a file to log data
  File logFile = SD.open("log.txt", FILE_WRITE);

// Write the header to the file
  logFile.println("Date,Time,Temperature,Humidity");
  logFile.close();
}

void loop() {
  // Read temperature and humidity data from the DHT11 sensor
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

// Create a string to log the data
  String dataString = String(year()) + "-" + String(month()) + "-" + String(day()) + "," +
                      String(hour()) + ":" + String(minute()) + ":" + String(second()) + "," +
                      String(temperature) + "," + String(humidity);

// Open the log file in append mode
  File logFile = SD.open("log.txt", FILE_WRITE);

// Write the data to the file
  logFile.println(dataString);
  logFile.close();

// Wait 10 minutes before logging again
  delay(600000);
}
```

### Example 2: Logging Digital Input States

In this example, we'll log the states of four digital input channels to a microSD card.

```c++
#include <SD.h>

// Define the digital input pins
const int inputPins[] = {2, 3, 4, 5};

void setup() {
  // Initialize the SD card
  SD.begin();

// Create a file to log data
  File logFile = SD.open("log.txt", FILE_WRITE);

// Write the header to the file
  logFile.println("Date,Time,Input 1,Input 2,Input 3,Input 4");
  logFile.close();
}

void loop() {
  // Create a string to log the data
  String dataString = String(year()) + "-" + String(month()) + "-" + String(day()) + "," +
                      String(hour()) + ":" + String(minute()) + ":" + String(second()) + ",";

// Read the digital input states
  for (int i = 0; i < 4; i++) {
    dataString += String(digitalRead(inputPins[i])) + ",";
  }

// Remove the trailing comma
  dataString.remove(dataString.length() - 1);

// Open the log file in append mode
  File logFile = SD.open("log.txt", FILE_WRITE);

// Write the data to the file
  logFile.println(dataString);
  logFile.close();

// Wait 10 minutes before logging again
  delay(600000);
}
```

### Example 3: Real-Time Clock (RTC) Usage

In this example, we'll use the RTC to log the current date and time to a microSD card.

```c++
#include <Wire.h>
#include <RTClib.h>
#include <SD.h>

// Create an RTC object
RTC_DS3231 rtc;

void setup() {
  // Initialize the SD card
  SD.begin();

// Check if the RTC is available
  if (!rtc.begin()) {
    Serial.println("RTC not found!");
    while (1);
  }

// Create a file to log data
  File logFile = SD.open("log.txt", FILE_WRITE);

// Write the header to the file
  logFile.println("Date,Time");
  logFile.close();
}

void loop() {
  // Get the current date and time from the RTC
  DateTime now = rtc.now();

// Create a string to log the data
  String dataString = String(now.year()) + "-" + String(now.month()) + "-" + String(now.day()) + "," +
                      String(now.hour()) + ":" + String(now.minute()) + ":" + String(now.second());

// Open the log file in append mode
  File logFile = SD.open("log.txt", FILE_WRITE);

// Write the data to the file
  logFile.println(dataString);
  logFile.close();

// Wait 10 minutes before logging again
  delay(600000);
}
```

These examples demonstrate the basic usage of the Arduino Data Logger Shield for logging sensor data, digital input states, and using the RTC. You can modify and expand upon these examples to suit your specific IoT project requirements.